In a certain code, COLD is coded as GSPH, then how is NOT coded in the same way?

Let's find the logic pattern behind the code COLD $\to$ GSPH:$C(3)+4=G(7)$$O(15)+4=S(19)$$L(12)+4=P(16)$$D(4)+4=H(8)$ Each character is shifted forward by $+4$ positions.Applying the same pattern to NOT:$N(14)+4=R(18)$$O(15)+4=S(19)$$T(20)+4=X(24)$ Thus, NOT is coded as RSX.